Cheesy Bacon & Mushroom Pasta Bake

Cheesy Bacon & Mushroom Pasta Bake

This is not subtle. This is big, bubbly, golden, unapologetic comfort in a dish. Cheddar-heavy cheese sauce, salty bacon, earthy mushrooms, and pasta all baked together until the top goes molten and slightly crisp at the edges. If you’re looking for delicate, keep scrolling. If you want proper comfort food that feeds a crowd and makes everyone happy, you’re in the right place.

There’s something unbeatable about a pasta bake. It’s reliable. It’s generous. It feels like you’ve made an effort even though the steps are straightforward. And this one stacks all the best ingredients into one tray. Smoky bacon, soft onions, buttery mushrooms, creamy béchamel loaded with cheddar and parmesan, and a golden cheesy lid to finish it off.

The magic here is contrast. You’ve got soft pasta coated in silky sauce underneath, crispy bacon scattered through the middle, and that bubbling, golden top layer that gives you those slightly chewy, toasted cheese bits everyone fights over. It’s comfort food that knows exactly what it’s doing.

This works for dinner, leftovers for lunch, feeding family, feeding mates, or batch cooking for the week. It’s hearty without being complicated. Rich without being ridiculous. Exactly what a pasta bake should be.

Why this pasta bake works so well

Undercooking the pasta slightly before baking is essential. It finishes cooking in the oven and absorbs some of the sauce, which keeps everything cohesive instead of watery.

The cheese sauce is a classic béchamel built directly in the pan. Butter, flour and milk create the base, then cheddar and parmesan take it somewhere serious. The nutmeg might seem small, but it adds warmth and depth that rounds everything out.

Bacon lardons bring salt and smokiness. Cooking them with the onion means the fat renders down and flavours the whole base of the dish.

Mushrooms soak up that bacon flavour and add earthiness. They balance the richness of the cheese and keep the dish from feeling one-dimensional.

Using cheddar in the sauce and again on top creates layers of flavour. Parmesan adds sharpness and helps that top go golden and slightly crisp.

This is texture done right. Creamy centre, crispy edges, golden top. No soggy pasta bake disasters here.

Equipment you’ll need

A large saucepan for cooking the pasta.

A medium saucepan for making the cheese sauce.

A frying pan for cooking the bacon and vegetables.

A large ovenproof dish for assembling and baking.

A whisk for the sauce and a wooden spoon for mixing.

Solid, basic kitchen kit. Nothing fancy.

Ingredients

350 g pasta, fusilli works well
50 g butter
50 g plain flour
600 ml whole milk
150 g cheddar cheese, grated
40 g parmesan, grated
½ tsp ground nutmeg
1 onion, diced
250 g bacon lardons or bacon rashers cut into strips
150 g mushrooms, cut into quarters
10 g parsley, chopped

For the topping

100 g cheddar cheese, grated
40 g parmesan, grated

Salt and black pepper
Cooking oil

How to make it

Preheat the oven to 180C fan.

Bring a large pan of salted water to the boil and cook the pasta for 2 minutes less than the packet instructions. Drain and set aside.

To make the cheese sauce, add the butter, flour and milk straight into a saucepan over a medium heat. Whisk continuously as the butter melts and the mixture begins to thicken. Keep whisking until you have a smooth, thick sauce.

Turn off the heat and stir in the grated cheddar, parmesan and ground nutmeg. Stir until fully melted and smooth. Taste and adjust seasoning with salt and black pepper if needed.

In a frying pan, heat a small drizzle of cooking oil over a medium to high heat. Add the diced onion and bacon. Cook for about 5 minutes until the onion softens and the bacon starts to crisp.

Add the mushrooms and cook for a few more minutes until softened and lightly golden.

Tip the cooked pasta into a large ovenproof dish. Add the bacon, mushrooms, onion and chopped parsley. Mix everything together evenly.

Pour over the cheese sauce and stir until all the pasta is coated and evenly distributed.

Scatter the grated cheddar and parmesan evenly over the top.

Bake for about 20 minutes, or until golden, bubbling and slightly crisp on top.

Remove from the oven and let it sit for a few minutes before serving. This helps it settle and makes it easier to portion.

Serve hot.

Tips for best results

Salt your pasta water properly. It should taste seasoned before the pasta goes in.

Whisk the sauce continuously to avoid lumps.

If your sauce gets too thick before adding cheese, add a small splash of milk to loosen it.

Cook the bacon until lightly crisp before adding mushrooms. That texture contrast matters.

Don’t overbake. You want bubbling and golden, not dry and crusted through.

If you want extra indulgence, add small chunks of mozzarella into the pasta before baking for pockets of melt.

Storage and leftovers

This keeps well in the fridge for up to 3 days in an airtight container.

Reheat in the oven at 180C until heated through, or microwave individual portions. Add a splash of milk before reheating to loosen the sauce if needed.

It also freezes well. Cool completely before freezing in portions for up to 3 months. Defrost overnight in the fridge before reheating.

Leftovers make a solid next-day lunch.

FAQs

Can I use a different pasta shape?
Yes. Penne, rigatoni or macaroni all work well. Just stick to short pasta shapes that hold sauce.

Can I use semi-skimmed milk instead of whole?
Yes, but the sauce will be slightly less rich. It still works.

Can I make this ahead of time?
Absolutely. Assemble it fully, cover and refrigerate. Bake when ready to serve, adding an extra few minutes if baking from cold.

Can I add vegetables?
Yes. Spinach, peas or broccoli would work well. Just don’t overload it or the sauce ratio gets thrown off.

Can I make it without mushrooms?
Of course. Leave them out or replace with something you prefer.

Why is my sauce grainy?
Usually from overheating after adding cheese. Stir the cheese in off the heat to keep it smooth.

Cheesy, smoky, creamy and golden. This bacon and mushroom pasta bake delivers everything you want from comfort food in one tray.

Big flavours, proper portions, zero fuss. Pasta bake done right.